Server reported an error: FAULT = '3900'

General
1

My project is working well and suddenly started giving this error so register a user. Can not return the currentUser. Nothing works. Have any solution for this?

Server reported an error: FAULT = ‘3900’ [User is missing or null] <User is missing or null>

2

I really need an answer. I did not do anything for this error happen. My project is in progress and if this is not resolved soon have to change API!

3

Hi Juliana,

Can you please provide your appid and request you are trying to execute.

Regards,

Denys

4

My APPID is 006AEF26-256E-AD68-FF3B-8815FB534C00 and the first request after login is:

Types.tryblock({ () -> Void in

    let deviceId = backendless.messagingService.getRegistration().deviceId

    

    if deviceId != nil {

        let properties = ["deviceId" : deviceId]

        backendless.userService.currentUser.updateProperties(properties)

        backendless.userService.update(currentUser)

    }



}, catchblock: { (exception) -> Void in

    print("Server reported an error: \(exception as! Fault)") --> HERE REPORTED THIS ERROR

})

But if continue and request users, for example:
BackendlessCache -> invokeAsync: ‘com.backendless.services.persistence.PersistenceService’:‘find’ [policy: 0]

5

Internal ticket with id BKNDLSS-12927 has been created for this issue.

Regards,

Denys

6

Hi Juliana,

What Xcode version do you use?
Will these functions work for you?

  1. User registration:
    func registerUser(email: String, password: String) {
        
        Types.tryblock({ () -> Void in
            
            var user = BackendlessUser()
            user.email = email
            user.password = password
            
            user = self.backendless.userService.registering(user)
            print("User has been registered (SYNC): \(user)")
            },
                       
            catchblock: { (exception) -> Void in
                print("registerUser: server reported an error: \(exception as! Fault)")
            }
        )
    }
  1. User login:
    func loginUser(email: String, password: String) {
        
        Types.tryblock({ () -> Void in
            
            let user = self.backendless.userService.login(email, password: password)
            print("User has been logged in (SYNC): \(user)")
            },
                       
            catchblock: { (exception) -> Void in
                print("loginUser: server reported an error: \(exception as! Fault)")
        })
    }

Regards,
Slava

7

The only one case when fault == 3900 will be thrown with backendless.userService.update(user) is user == nil. See this code.

8

Xcode Version 7.3.1

My mistake is not in the registration or login… is the user update. But it returns the null user.

9

We need your full project to investigate the problem. Please upload it to Dropbox or Google Drive and send a link to support@backendless.com.
Also provide a step-by-step instruction how we could reproduce this issue.

10

Sorry, but I can’t send my code, and haven’t step by step, just your service stopped working. I do a registration/login and is not returned a user.

11

I just checked the registration/login with functions above:

http://support.backendless.com/public/attachments/4a539eb063a3970a8689507bcd57280c.png&lt;/img&gt;

Here is a log:
http://support.backendless.com/public/attachments/ce4129b31cacb7a5c8cc998b6c73cd56.png&lt;/img&gt;
And result on app console:
http://support.backendless.com/public/attachments/577544f21f7742d3ea8e33c078b6a967.png&lt;/img&gt;

So, our service works.

Could you create a new backendless app (new appId) - and check your app with it?

Regards,
Slava

4a539eb063a3970a8689507bcd57280c.png
4a539eb063a3970a8689507bcd57280c.png1392×134 34.6 KB

ce4129b31cacb7a5c8cc998b6c73cd56.png
ce4129b31cacb7a5c8cc998b6c73cd56.png1084×170 22.3 KB

577544f21f7742d3ea8e33c078b6a967.png
577544f21f7742d3ea8e33c078b6a967.png1950×290 51.8 KB

12

I created another application, but the problem was not that. The problem was because I was doing the registration / login and tried to access the backendless.userService.currentUser and does not return anything.

Now I get the user that the function returns. But as I said was working days ago.

13

Juliana,

I created a sample project with the latest Backendless SDK (pod ‘Backendless’ 3.0.31 release), which executes a registration/login/update operation with current user (see in attachment). It works for me.
Please load it with TestUserUpdate.xcworkspace, try it with my app, then set your appId & secretKey, and check again. How do it work for you?

Regards,
Slava

TestUserUpdate.zip (19.56MB)